Reg. umbil., regio umbilici, the umbilical region.
Repet., repetatur, or repetantur, let it, or them, be repeated.
S. A., secundum artem, according to art.
Scat., scatula, a box.
S. N., secundum naturam, according to nature.
Semidr., semidrachma, half a drachm.
Semih., semihora, half an hour.
Sesunc., sesuncia, half an ounce.
Sesquih., sesquihora, an hour and a half.
Si n. val., si non valeat, if it does not answer.